Răspuns:
[tex] \frac{1}{ \frac{2}{a + 1} } = \frac{1}{ \frac{3}{b + 2} } = \frac{1}{ \frac{4}{c + 3 } } \\ = \frac{3}{suma} = > = 3sau1[/tex]
a+1=2. a=1
b+2=3. b=1
c+3=4. c=1
a+1=2*3=6. a=5
b+2=3*3. b=7
c+3=4*3. c=9
2/6+3/7+4/3=44/21
sunt bune doar (1;1;1)
